SOUTHERN FIRST BANCSHARES INC

**UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

☒ Annual Report Pursuant To Section 13 Or 15(d) of The Securities Exchange Act of 1934

For The Fiscal Year December 31,2025.

Or

☐ Transition Report Pursuant To Section 13 Or 15(d) of The Securities Exchange Act of 1934

For the Transition Period from ___________ to ________________

Commission file number 000-27719

Southern First Bancshares, Inc.

(Exact name of registrant as specified in its charter)

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes ☐No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☐Accelerated filer ☒ Non-accelerated filer ☐ Smaller reporting company☐ Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. Yes☒ No ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements

of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐No ☒

The aggregate market value of the common equity held by non-affiliates of the registrant as of June 30, 2025 (based on the average bid and ask price of the Common Stock as quoted on the NASDAQ Global Market on June 30, 2025), was$292,504,676.

8,231,198 shares of the registrant’s common stock were outstanding as of February 13, 2026.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s Proxy Statement relating to the Annual Meeting of Shareholders to be held on May 19, 2026 are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated.

Southern First Bancshares, Inc.

Index to Form 10-K

CAUTIONARY NOTE REGARDING

FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains statements which constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Forward-looking statements may relate to our financial condition, results of operation, plans, business strategy, objectives, or future performance. These statements are based on many assumptions and estimates and are not guarantees of future performance. Our actual results may differ materially from those anticipated in any forward-looking statements, as they will depend on many factors about which we are unsure, including many factors which are beyond our control. The words “may,” “would,” “could,” “should,” “will,” “seek to,” “strive,” “focus,” “expect,” “anticipate,” “forecasts,” “predict,” “project,” “potential,” “believe,” “continue,” “assume,” “intend,” “plan,” and “estimate,” as well as similar expressions, are meant to identify such forward-looking statements. Potential risks and uncertainties that could cause our actual results to differ from those anticipated in any forward-looking statements include, but are not limited to, those described below under Item 1A. Risk Factors and the following:

If any of these risks or uncertainties materialize, or if any of the assumptions underlying such forward-looking statements proves to be incorrect, our results could differ materially from those expressed in, implied or projected by, such forward-looking statements. For information with respect to factors that could cause actual results to differ from the expectations stated in the forward-looking statements, see “Risk Factors” under Part I, Item 1A of this Annual Report on Form 10-K. We urge investors to consider all of these factors carefully in evaluating the forward-looking statements contained in this Annual Report on Form 10-K. We make these forward-looking as of the date of this document and we do not intend, and assume no obligation, to update the forward-looking statements or to update the reasons why actual results could differ from those expressed in, or implied or projected by, the forward-looking statements, except as required by applicable law.